T-54/55 versions

[brummbaer]

PlasmaKrab said:
As well, what would be the actual difference between tanks of the T-55M and T-55AM series? If we assume both modernizations were carried out at the same time, on modernized T-55As and plain T-55s, wouldn't the latter also get the 55A-level upgrades like the PKT and DShK?
In the same way as what Don said above, both M and AM series could probably be collapsed together.

The main difference is the same between T-55 and T-55A, i.e. the anti-radiation liner, and the lacking in A of the bow MG. Don't know about changing MG in modernized plain T-55s, but irrilevant I'd say. So I agree, not a major difference for SP purpose, as long as they don't cover nuclear warfare .
It's even difficult to tell the A apart from the plain T-55, as in some pictures tanks named T-55 and T-55M apparently lack the bow MG hole!
What I know about modernization years is above, anyway being the plain T-55 older it's reasonable to assume they underwent it earlier. Maybe i misunderstand you, but just for clarity T-55A weren't modernized tanks but new-built ones.